15. ••• The current in a resistor is given by I = (12.0 A)sin(380t).

(a) What is the frequency of the current?

(b) What is the rms current?

(c) How much average power is delivered to the resistor?

(d) Write an equation for the voltage across the resistor as a function of time.

(e) Write an equation for the power delivered to the resistor as a function of time.

(f) Show that the rms power obtained in part

(e) is the same as your answer to part (c).